From Wikipedia: "Omega Centauri ( NGC 5139, or Caldwell 80) is a globular cluster in the constellation of Centaurus that was first identified as a non-stellar object by Edmond Halley in...
RCW 16 is a nebula an a star forming region in the constellation Puppis. It's also known as the Mandrill Nebula, the Skull and Crossbones Nebula, Sh2-311, Gum 9, and NGC 2467.